Adjustable thong sandal



FIG. 1 is a right side elevational view of an adjustable thong sandal showing my new design;

FIG. 2 is a left side elevational view of the sandal;

FIG. 3 is a front elevational view of the sandal;

FIG. 4 is a rear elevational view of the sandal;

FIG. 5 is a top plan view of the sandal; and,

FIG. 6 is a bottom plan view of the sandal. 

The ornamental design for an adjustable thong sandal, as shown and described. 